Publication

Critical current and electronic properties of YBCO-Ag compounds

Davor Pavuna
1989
Journal Articles

Abstract

We have found that in YBCO-Ag ceramic compounds Ag fills the intergranular space ('holes') without affecting Tc. Normal-state resistivity is decreased by approximately equals × 100 when adding up to 50 wt% Ag. Percolation analysis shows that the critical indices t,s are in agreement with 3D theoretical values, but pc is higher than expected. The critical current density Jc is enhanced by up to 50% in the samples containing approximately 10 wt% Ag, this enhancement corresponds to a maximum YBCO compactness in the samples.

Official source

https://infoscience.epfl.ch/entities/publication/c6469856-975e-4438-8ad2-84f82cb5df68

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Davor Pavuna
1989
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c6469856-975e-4438-8ad2-84f82cb5df68

About this result

Related concepts (15)

Equal temperament

An equal temperament is a musical temperament or tuning system that approximates just intervals by dividing an octave (or other interval) into equal steps. This means the ratio of the frequencies of any adjacent pair of notes is the same, which gives an equal perceived step size, as pitch is perceived roughly as the logarithm of frequency.

12 equal temperament

12 equal temperament (12-ET) is the musical system that divides the octave into 12 parts, all of which are equally tempered (equally spaced) on a logarithmic scale, with a ratio equal to the 12th root of 2 ( ≈ 1.05946). That resulting smallest interval, the width of an octave, is called a semitone or half step. Twelve-tone equal temperament is the most widespread system in music today. It has been the predominant tuning system of Western music, starting with classical music, since the 18th century, and Europe almost exclusively used approximations of it for millennia before that.

Quarter tone

A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (orally, or logarithmically) as a semitone, which itself is half a whole tone. Quarter tones divide the octave by 50 cents each, and have 24 different pitches. Quarter tones have their roots in the music of the Middle East and more specifically in Persian traditional music. However, the first evidenced proposal of the equally-tempered quarter tone scale, or 24 equal temperament, was made by 19th-century music theorists Heinrich Richter in 1823 and Mikhail Mishaqa about 1840.